The "nano ink" printing the solar cell made of stainless steel plate, light, power conversion efficiency world record. Yesterday, Dr. Qian Lei, general manager of Suzhou Rui Sheng Nano Technology Co. revealed a solution developed by the company law coating process CIGS solar cell with high conversion efficiency of 17.3% set a world record of similar products, the current record It has been certified by China Institute of Metrology; by the end of next year, China's first use of the technology of solar cell production line mass production in Suzhou.

"Conversion efficiency is a measure of solar light energy conversion level indicator." Qian Lei said: "After decades of development, from the generation of crystalline silicon solar cells, thin film batteries develop second-generation vacuum to the three generations of non-vacuum thin-film battery, Currently, three generations of cell conversion efficiency United States, Japan, Germany and other technology powers about 15 percent, and the use of our technology, product conversion efficiency of 17.3%. "

In the company's laboratory staff demonstrated the production process: like cocktails, like the raw materials such as copper indium gallium selenide proportional to prepare a "nano-ink", by winding thin film magnetron sputtering equipment, high-precision winding film coating systems, the "nano ink" is uniformly printed to 50 microns thick stainless steel plate, after heating and other processes, stainless steel has become used to generate electricity, "Solar volume", according to the actual needs of "Solar Volume" be cut, packaged, made of solar cells.

"'Nano-ink' is our core technology, to capture the second-generation solar cell production equipment is expensive, complex process bottlenecks, greatly improving the productivity and yield." Qian Lei introduced the second generation and third generation of solar cells are used in coating technology to produce But second-generation battery vacuum production equipment is expensive, a 300-megawatt production line to vote at least 2 billion yuan; the production, the raw materials such as copper indium gallium selenide points placed in a vacuum apparatus, after heating evaporation rata sputtering stainless steel plate to form a film, because of the different vapor evenly distributed proportionally stable stainless steel plate more difficult, so the yield rate of the second generation of the battery 30% -40%, the utilization rate of raw materials is difficult to over 60%. Qian Lei said: "Now, press the proportions of good 'nano-ink' and then printed onto a stainless steel plate, the chemical composition of a highly stable, easy to operate technology to solve the main problem is not only the production of second-generation cell product yield of 90%. above, material utilization rate of 95%, and the investment of a similar capacity of the production line, costs less than a quarter of second-generation production line. "

Rui Sheng November 2010, the registered capital of 300 million yuan. Currently, the company has a patented invention is completely independent intellectual property rights more than thirty. Qian Lei is the "returnees", has business in the United States. Last July, the company's research and development team has created 16.3% of the effective area of ​​the conversion efficiency, and certified by the United States Newport.

Production process

Like cocktails, like the raw materials such as copper indium gallium selenide proportional to prepare a "nano-ink", by winding thin film magnetron sputtering equipment, high-precision winding film coating systems, the "nano-ink" uniformly printed 50 micron thick stainless steel plate, after heating and other processes, stainless steel has become used to generate electricity, "Solar volume", according to the actual needs of the "Solar volumes" were cut, packaged, made solar cells.